An Ultra-high Numerical Aperture Metalens at Visible Wavelengths
Optics
2018-08-01 v1
Abstract
We demonstrate a metalens with NA = 0.98 in air, a bandwidth (FWHM) of 274 nm and a focusing efficiency of 67% at 532 nm wavelength, which is close to the transmission performance of a TiO2 metalens. Moreover, and uniquely so, our metalens can be front-immersed into immersion oil and achieve an ultra-high NA of 1.48 experimentally and 1.73 theoretically, thereby demonstrating the highest NA of any metalens in the visible regime reported to the best of our knowledge.
Cite
@article{arxiv.1804.08339,
title = {An Ultra-high Numerical Aperture Metalens at Visible Wavelengths},
author = {Haowen Liang and Qiaoling Lin and Xiangsheng Xie and Qian Sun and Yin Wang and Lidan Zhou and Lin Liu and Xiangyang Yu and Jianying Zhou and Thomas F Krauss and Juntao Li},
journal= {arXiv preprint arXiv:1804.08339},
year = {2018}
}
Comments
22 pages, 7 figures, an original journal paper